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APPLICATION
GUIDE
INNOV@
ENERGY
Close control units
eDrive
6  70 kW
INNOVA ENERGY-AGU-1407-E
lennoxemeia.com
CONTENTS
PAGE
1. GENERAL DESCRIPTION
1.1 Structure
1.2 Application limits
1.3 Cooling circuit
1.4 Installation warnings
3
5
6
7
10
2. INSPECTION
2.1 Inspection on receipt
2.2 Lifting and transport
2.3 Unpacking
2.4 Positioning
11
11
11
11
11
3. INSTALLATION
12
4. EVACUATION AND CHARGING OPERATIONS
4.1 Introduction
4.2 Vacuum and charging machine
4.3 Evacuating a circuit “contaminated” with refrigerant
4.4 Charging positions (single point)
13
13
14
14
15
5. ELECTRICAL CONNECTIONS
5.1 Generalities
16
16
6. OPERATING DIAGRAMS
17
7. STARTING UP
7.1 Preliminary checks
7.2 Starting operations
7.3 Checks during operations
7.4 Checking the refrigerant charge (DX versions)
18
18
18
18
19
8. SETTING OPERATING PARAMETERS
8.1 Generalities
8.2 Maximum pressure switch
8.3 Minimum pressure switch
20
20
20
20
9. MAINTENANCE
9.1 Warnings
9.2 Generalities
9.3 Inspecting the air filter
9.4 Set the right fan speed
9.5 Repairing the cooling circuit
9.6 Tightness test
9.7 Hard vacuum and drying of cooling circuit
9.8 Recharging with refrigerant R410C
9.9 Environmental protection
21
21
21
22
25
25
26
26
27
27
10. TROUBLESHOOTING
28
11. TECHNICAL DATA
30
12. REFRIGERANT PIPES
32
13. REFRIGERANT CHARGE
32
INNOV@ ENERGY -AGU-1407-E
•1•
Codification
This codification describe the whole INNOV@ range. All operating modes are not available on
each type of unit.
Type of unit
DM
DH
IN
Medium range height 1875mm
High range height
1998mm
ENERGY range : eDrive unit with EC plug fan and BLDC compressor
Operating mode
A
W
Z
F
C
:
:
:
:
:
Direct expansion with remote condenser
Direct expansion water condensed with remote dry-cooler
Direct expansion city water condensed
Direct expansion water condensed with remote dry-cooler and indirect Free-cooling
Chilled water unit
Dual cooling units
In this case this is combination of unit with operating mode above and chilled water to work with
chiller. Which provide more safety to your installation.
D
K
Q
:
:
:
Direct expansion with remote condenser +chilled water coil
Direct expansion water condensed with remote dry-cooler+chilled water coil
Direct expansion city water condensed+chilled water coil
Airflow configuration
U
D
X
:
:
:
Upflow
Downflow
Displacement
Type of fan
C
R
:
:
Centrifugal double inlet forward curve
EC plug fan
Nominal capacity
Capacity in kW (in this case 11kW)
DMAUR0110
Refrigerant circuit
0
2
4
5
INNOV@ ENERGY -AGU-1407-E
:
:
:
:
1 or No compressor (CW)
2 compressors / 2 circuits
4 compressors / 2 circuits
1 compressor / 1 circuit
•2•
1. General description
INNOV@ENERGY CCAC self-contained units are specially designed for installation in technological
environments such as Computer rooms, laboratories and in general where a high precision in climate control
and a 24h/day operation are requested. INNOV@ENERGY units represent the state of the art between
technology and design as well as all LENNOX products: thanks to their characteristics, INNOV@ENERGY
can be installed also in offices where people are working. The depth of 795 mm (600mm for size 091 and
size 131) for all versions, allows the compatibility with standard electronic devices: furthermore the innovative
design and the high tech selected colours (RAL9002) make INNOV@ENERGY units complementary to the
last generation of IT devices. The internal design of the units in firstly made looking to efficiency and
reliability but don't loosing accessibility: all components, including e-heaters, fans, compressors, valves, etc.
can be maintained from the front and furthermore the door(s) are dismountable in few seconds thanks to an
innovative hinge: this is very important when units are installed in small corridors. The exclusive use of
primary brands components and a fully integrated development process (CAD+CAM, CAE) stands for
highest possible quality level regarding efficiency, reliability, maintenance time, pre and after sales support.
All the units are available both in single circuit up to 34,1 kW and up to 68,5 kW in double circuit.

Single circuit configuration
Front extractable
air filter
Plug fan with
alluminium wheel
and EC motor
Electrical panel
Scroll compressor
Stainless steel
drain pan
Oil separator
Filter dryer
Humidifier
Inverter
INNOV@ ENERGY -AGU-1407-E
Liquid receiver
•3•

Double circuit configuration
Front extractable
air filters
Plug fans with
alluminium wheel
and EC motor
Electrical panel
Stainless steel
drain pan
Humidifier
INNOV@ ENERGY -AGU-1407-E
Scroll
compressors
Inverters
•4•
1.1 Structure
INNOV@ENERGY units are designed with a self supporting frame and all components are produced using
sophisticated computer driven machines and special tools. All sheet metals are galvanized and all external
panels are powder coated RAL 9002 giving to the units the image and the quality like last generation of IT
devices. Units are completely closed and only frontal access is requested. Anyway it is also possible to have
side access in order to reach the steam piping and the drain pan, or simply to substitute a damaged side
panel: all this problems are very rare, but with INNOV@ENERGY units it is possible to solve them. The
shape of the units is characterized with the curved edges with variable radium as for all LENNOX products:
this feature is obtained using special tools and gives both a good aesthetic and advantages against injuries.
The compressor compartment is separated from the air flow and the special internal design allows the simple
dismounting of the upper part of it ensuring an insuperable accessibility to all refrigerating components.
All fixing elements are made in stainless steel or in non corroding materials. The dray pan is made in
stainless steel in order to ensure long time operation without damages.
All panels are thermally insulated with a polyurethane foam class 1 according UL 94 norms: this material,
thanks to the open cells, gives good performances in sound absorption. As an option, sandwich panels are
available: in this case mineral fibres are closed between the panel and a second sheet of metal giving the
maximum in terms of internal cleaning. Double skin panels are classified between non flammable materials
class A1 according DIN 4102 norms : the sound insulation is better than the standard solution, but the
internal reflected sound power will increase the amount in delivery side (+2dB).
Power supply limits and Storage conditions for DX versions:
Model
INNOV@ ENERGY -AGU-1407-E
INA..R
Power supply
Nominal Value +/-10%
Storage conditions
-10 / 90 % r.h.
+ 55 / 90 % r.h.
•5•
1.2 Application limits

INA..R - Air condensed versions:
Indoor air
Temp.
RH <= 65 %
32°
28°
Condenser air
Temp.
18
20°

40°
45°
INW..R - Water condensed versions:
RH <= 65 %
Indoor air T
32°
28°
Condenser
water Temp.
18
25°
INNOV@ ENERGY -AGU-1407-E
40°
43°
•6•
1.3 Cooling circuit
The entire refrigerating circuit is assembled in our warehouse including all pipe work and using only primary
brand for components. The workers involved in the welding and pipe work process are qualified by a third
part according CEE 97/23 PED directive: it is worth to be underlined that this qualification for workers were
not request, but it is our own decision taking care of the quality and/or in general to the customer satisfaction.
All DX unit (“A”, “W”, “F”, “D”, “Q” versions) are prechargerd with dry nitrogen for “A”, “D” or with R410A
refrigerant for “W”, “F”, “Q” versions.

Compressors: on INNOV@ENERGY units only primary brand scroll compressors in special execution for
inverter application motor, are installed (excepted the 060 model in which a rolling piston compressor are
installed) . Scroll compressor represent for CCAC units the best solution in terms of efficiency and
reliability. The internal compression ratio is very close to the typical operating condition of CCAC giving
the maximum in terms of COPs and the perfect balanced pressures at start up gives big advantages to
the e_motor in terms of reliability, mainly in this filed where frequent start up may be possible. All motors
are thermally protected with an internal sensors chain: in case of overload this sensor opens without
giving contacts to the connection box.

Cooling components:
o Molecular mesh activated-alumina filter dryer
o Flow indicator with humidity indicator. Indications are provided directly on the sight glass.
o electronic driven valves
o High and low pressure switches
o Schrader valves for checks and/or maintenance

Electric control board: The electric control board is constructed and wired in accordance with Directives
73/23/EEC and 89/336/EEC and related standards. The board may be accessed through a door after the
main switch has been turned off. All the remote controls use 24 V signals powered by an insulating
transformer
situated
on
the
electric
control
board.
NOTE: the mechanical safety devices such as the high pressure switch are of the kind that trigger
directly; their efficiency will not be affected by any faults occurring in the microprocessor control circuit, in
compliance with 97/23 PED.

Control microprocessor: the microprocessor built into the unit allows the different operating parameters
to be controlled from a set of pushbuttons situated on the electric control board;
o Switching on/off of compressor(s) to maintain the temperature set point T inside the shelter
o Alarm management
 High / low pressure
 Dirty filters alarm (optional)
 Air flow alarm
o Alarm signalling
o Display of operating parameters
o RS232, RS485 serial output management (optional)
o Phase sequence error [Not displayed by the mP, but prevents the compressor from starting up]
[see microprocessor control manual for further details, also in relation to particular customer
specifications]
INNOV@ ENERGY -AGU-1407-E
•7•

Basic cooling circuit for DX versions (1 circuit)
Ref.
Description
Ref.
Description
11
Condenser
12
13
14
15
16
Flooding valve
Safety valve
Check valve
Solenoid valve
Hot gas coil (opt.)
Hot gas check valve
opt.
Hot gas thermostatic
valve opt.
Hot gas solenoid valve
opt.
2
3
4
5
6
Inverter driver
compressor
HP Pressure switch
Pressure probe (opt.)
Ball valve
Refrigerant filter
Sight glass
7
Thermostatic valve
17
8
Evaporator
18
9
LP pressure switch
19
10
Liquid receiver
1
INNOV@ ENERGY -AGU-1407-E
•8•

Basic cooling circuit for DX versions (2 circuits)
Ref
1
2
3
4
5
6
7
8
INNOV@ ENERGY -AGU-1407-E
Description
Inverter driver
compressor
HP Pressure switch
Pressure probe (opt.)
Ball valve
Refrigerant filter
Sight glass
Thermostatic valve
Evaporator
Ref
Description
9
LP pressure switch
10
11
12
13
14
15
Liquid receiver
Condenser
Flooding valve
Safety valve
Check valve
Solenoid valve
•9•
1.4 Installation warnings

General rules
- When installing or servicing the unit, you must strictly follow the rules provided in this manual, comply with
the directions on the units themselves and take all such precautions as are necessary.
- The fluids under pressure in the cooling circuit and the presence of electrical components may cause
hazardous situations during installation and maintenance work.
All work on the unit must be carried out by qualified personnel only, trained to do
their job in accordance with current laws and regulations.
- Failure to comply with the rules provided in this manual or any modification made to the unit without prior
authorisation will result in the immediate invalidation of the warranty.
Warning: Before performing any kind of work on the unit, make sure it has been
disconnected from the power supply.
INNOV@ ENERGY -AGU-1407-E
• 10 •
2. Inspection / Transport / Positioning
2.1 Inspection on receipt
On receiving the unit, check that it is perfectly intact: the unit left the factory in perfect conditions;
immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing it.
LENNOX or its agent must be promptly notified of the entity of the damage. The Customer must submit a
written report describing every significant sign of damage.
2.2 Lifting and Transport
While the unit is being unloaded and positioned, utmost care must be taken to avoid abrupt or violent
manoeuvres. The unit must be handled carefully and gently; avoid using machine components as
anchorages or holds and always keep it in an upright position.
The unit should be lifted using the pallet it is packed on; a transpallet or similar conveyance means should
be used.
Warning: In all lifting operations make sure that the unit is securely anchored in order to
prevent accidental falling or overturning.
2.3 Unpacking
The packing must be carefully removed to avoid the risk of damaging the unit. Different packing materials
are used: wood, cardboard, nylon etc.
It is recommended to keep them separately and deliver them to suitable waste disposal or recycling facilities
in order to minimise their environmental impact.
2.4 Positioning
Bear in mind the following aspects when choosing the best site for installing the unit and the relative
connections:
- positioning and dimensions of the coupling flanges;
- location of power supply;
- solidity of the supporting floor;
It is recommended to first prepare holes in the floor/wall for passing through the power cables and for the air
outlet (down flow units).
The dimensions of the air outlet and the positions of the holes for the screw anchors and power cables are
shown in the dimensional drawings.
INNOV@ ENERGY -AGU-1407-E
• 11 •
3. Installation
The INNOV@ENERGY air-conditioning unit is suitable for all environments except aggressive ones. Do not
place any obstacles near the units and make sure that the air flow is not impeded by obstacles and/or
situations causing back suction.
MODEL
A(mm)
B(mm)
C(mm)
D(mm)
E(mm)
INADR0091- INAUR0091
INADR0131 - INAUR0131
INADR0241 - INAUR0241
INADR0341 - INAUR 0341
INADR0462 - INAUR 0462
INADR0682 - INAUR 0682
600
900
1010
1280
2030
2510
650
650
750
750
750
750
600
600
795
795
795
795
10
10
10
10
10
10
1875
1875
1998
1998
1998
1998
The following steps should be carried out to ensure proper installation:
− Apply a anti-vibration rubber lining between the unit and the bottom
− Position the unit on the floor / floorstand (base frame)
The recommended sizes for the power cables and emergency line are shown in the table below:
Model
unit
INADR0091- INAUR0091
INADR0131 - INAUR0131
INADR0241 - INAUR0241
INADR0341 - INAUR 0341
INADR0462 - INAUR 0462
INADR0682 - INAUR 0682
INNOV@ ENERGY -AGU-1407-E
Main power
supply
400V/3Ph+N/50Hz
Cable type
4x2,5 mmq + T 2,5mmq
4x6 mmq + T 6mmq
4x16 mmq + T 16mmq
4x16 mmq + T 16mmq
4x25 mmq + T 16mmq
4x25 mmq + T 16mmq
• 12 •
4. Evacuation and charging operations
This type of work must be carried out by qualified personnel only trained to do their
job in accordance with current laws and regulations.
4.1 Introductions
The contemporaneous presence of liquid and vapour requires for both to be in a state of saturation [Gibb’s
law], as shown in the fig. 1. In thermal equilibrated conditions, the pressure in the tank corresponds to the
ambient temperature. Withdrawal of refrigerant from the tank has following effects:
- withdrawal of refrigerant charge
- pressure drop inside the tank
- T drop & change of status
- cooling of liquid
 pressure drop inside the tank
 T drop & change of status
 evaporation of part of the liquid, causing a cooling down
of the liquid
 thermal exchange with ambient air, further evaporation of
remaining liquid; the original pressure in the tank will be
restored after a certain period of time
T tank/ambient
P
fig. 1
Saturated gas
Saturated
liquid
Enthalpy h
INNOV@ ENERGY -AGU-1407-E
• 13 •
4.2 Vacuum and charging machine

Vacuum cycle
In general it is better to apply a “long” rather than a “hard” vacuum: reaching a low pressure too abruptly
may in fact cause that any remaining humidity evaporates instantaneously, thus freezing part of it.
fig. 3
P [Pa]
150
6
200 s
Time
The fig.3 represents a vacuum cycle and an optimal subsequent pressure rise for the refrigeration devices
we manufacture.
Generally in bigger refrigeration systems or if there is a suspicion of an extensive quantity of humidity in the
refrigeration circuit, the vacuum needs to be “broken” by using anhydrous nitrogen. Then the steps of
evacuation need to be repeated as described before. This operation facilitates the removal of remaining
and/or frozen humidity during the evacuation process.
4.3 Evacuating a circuit “contaminated” with refrigerant
The first step is to remove the refrigerant from the circuit. To do this a specific machine is necessary with a
drying compressor in order to recover the refrigerant.
Refrigerants all tend to dissolve in oil [compressor sump]. The "Oil" figure illustrates a specific property
[Charles’ Law] of gases, which are more soluble in liquids as the pressure increases but less soluble as the
temperature increases.
T oil
Pressure
T3
T2
T1
“Oil” fig.
% of refrigerant in oil
If the oil in the sump is held at a constant pressure, an increase in temperature will significantly reduce
the amount of refrigerant dissolved in it, thus ensuring that the lubricating function desired is maintained.
The problem of inadequate lubrication occurs if the crankcase is not duly heated, above all after seasonal
INNOV@ ENERGY -AGU-1407-E
• 14 •
interruptions when, due to the suction effect of the compressor, there is an abrupt drop in pressure inside
the sump, which results in considerable evaporation of the refrigerant previously dissolved in the oil. If
heating elements were not installed, this phenomenon would cause two problems:
The release of refrigerant from the cooling circuit tends to cool down the oil and thus actually creates the
opposite effect by keeping more refrigerant dissolved in the oil: for this reason, it is advisable to switch on
–if available- the crankcase heater during the evacuation process.
If a high % of refrigerant gets in contact with the Pirani gauge (vacuum sensor), it may “mislead” this
sensitive sensor and misinterpret the value for a certain period of time. For this reason -if no machine for
recovering refrigerant is available- it is nonetheless advisable to switch on the crankcase heater and to
avoid full vacuum before the circuit has been adequately purged of refrigerant. The refrigerant may in fact
dissolve in the oil of the vacuum pump, reducing its performance for a long time (hours).
4.4 Charging position (single point)
The best position to charge the unit is the section between the thermostatic valve and the evaporator.
Take care to avoid the fixing of the thermostat bulb until the operation is completed. It is important to
ensure that the valve orifice remains open in order to allow the passage of refrigerant also towards the
condenser / liquid receiver.
If possible, avoid the charge of refrigerant into the suction line of the compressor as this may cause
excessive dilution of the lubricant.
In any case verify first the necessary volume of the crankcase and compare it with the required charge
volumes.
INNOV@ ENERGY -AGU-1407-E
• 15 •
5. Electrical connections
5.1 Generalities
Before carrying out any job on electrical parts, make sure the power supply is disconnected.
Check that the mains electricity supply is compatible with the specifications (voltage, number of phases,
frequency) shown on the unit rating plate.
The power connection for single-phase loads is to be made with a three-pole cable and “N” wire at the
centre of the star [optional: power supply w/o neutral].
The size of the cable and line protections must conform to the specifications provided in the
wiring diagram.
The supply voltage may not undergo fluctuations exceeding ±5% and the unbalance between phases must
always be below 2%.
The above operating conditions must always be complied with: failure to ensure said
conditions will result in the immediate invalidation of the warranty.
The electrical connections must be made in accordance with the information shown in the wiring diagram
provided with the unit and with current and local regulations.
An earth connection is mandatory. The installer must connect the earthing wire using the earthing terminal
situated on the electric control board (yellow and green wire).
The power supply to the control circuit is taken from the power line through an insulating transformer situated
on the electric control board.
The control circuit is protected by suitable fuses or automatic breakers depending on the unit size.
Never connect the inverter driven compressors directly to the 400/3/50 power supply.
INNOV@ ENERGY -AGU-1407-E
• 16 •
6. Operating diagrams
N_DR
INNOV@ ENERGY -AGU-1407-E
N_UR
N_XR
• 17 •
7. STARTING UP
7.1 Preliminary checks
-
-
Check that the electrical connections have been made properly and that all the terminals are securely
tightened. This check should also be included in a periodic six-month inspection.
Check that the voltage at the RST terminals is 400 V ± 5% and make sure the yellow indicator light of
the phase sequence relay is on. The phase sequence relay is positioned on the electric control board; if
the sequence is not duly observed, it will not enable the machine to start.
Make sure there are no refrigerant leakage that may have been caused by accidental impacts during
transport and/or installation.
Check the power supply to the crankcase heater, where present.
The heating elements must be turned on at least 12 hours before the unit is started. They
are automatically activated when the main switch is put on. Their function is to raise the T
of the oil in the sump and limit the quantity of refrigerant dissolved in it.
To verify whether the heating elements are working properly, check the lower part of the compressors: it
should be warm or in any case at a temperature 10 - 15 °C higher than the ambient temperature.
Pressure
Oil T
% R407C in oil
The diagram above illustrates a specific property of gases [Charles’ Law], which are more soluble in liquids
as the pressure increases but less soluble as the temperature increases: if the oil in the sump is held at a
constant pressure, an increase in temperature will significantly reduce the amount of refrigerant dissolved
in it, thus ensuring that the desired lubricating function is maintained.
7.2 Starting operations
Before starting the unit, turn the main switch on, select the operating mode desired from the control panel
and press the "ON" button on the control panel.
If the unit fails to start up, check if the service thermostat has been set according to the nominal values
provided.
You should not disconnect the unit from the power supply during periods when it is
inoperative but only when it is to be taken out of service for a prolonged period (e.g. at the
end of the season).
7.3 Checks during operations
- Check the phase sequence relay on the control board to verify whether the phases occur in the correct
sequence: if they do not, disconnect the unit from power supply and invert two phases of the incoming
three-pole cable. Never attempt to modify internal electrical connections: any undue modifications will
immediately invalidate the warranty.
INNOV@ ENERGY -AGU-1407-E
• 18 •
7.4 Checking the refrigerant charge
- After a few hours of operation, check whether the liquid level indicator has a green ring: a yellow colour
indicates the presence of humidity in the circuit. In such a case the circuit must be dehumidified by
qualified personnel.
- Large quantities of bubbles should not appear through the liquid level indicator. A constant passage of
numerous bubbles may indicate that the refrigerant level is low and needs to be topped up. The presence
of a few bubbles is however allowed.
- Make sure that the refrigerant gas super-heating is limited to between 5 and 8 °C: to this end:
1) read the temperature indicated by a contact thermometer placed on the compressor intake pipe;
2) read the temperature indicated on the scale of a pressure gauge likewise connected to the intake side;
refer to the pressure gauge scale for the refrigerant R410A.
The degree of super-heating is given by the difference between the temperatures thus determined.
- Make sure that the Sub-cooling of the cooling fluid is limited to between 3 and 5°C: to this end:
1) read the temperature indicated by a contact thermometer placed on the condenser outlet pipe;
2) read the temperature indicated on the scale of a pressure gauge connected to the liquid inlet at the
condenser outlet; refer to the pressure gauge scale for the refrigerant R410A.
The degree of Sub-cooling is given by the difference between the temperatures thus determined.
Warning: all the air condensed INNOV@ENERGY units are charged with dry nitrogen. Any
top-ups must be made using the same type of refrigerant. This operation is to be considered
extraordinary maintenance work and must be performed by qualified personnel only.
Warning: the refrigerant R410A requires “PVE” polyester oil of the type and viscosity
indicated on the compressor rating plate.
For no reason should oil of a different type be introduced into the oil circuit.
Note :
In INNOV@ENERGY units HFC R410A is used. This refrigerant is a mixture of R32 and R125 (50% - 50%),
nearly azeotropic. Its behaviour is much similar to that one of a pure fluid: in fact it introduces a glide
approximately 0,1°C.
INNOV@ ENERGY -AGU-1407-E
• 19 •
8. Setting operating parameters
8.1 Generalities
All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit
has been in service for a reasonable period of time you can perform a check on the operating and safety
devices. The settings are shown in Table II.
All servicing of the equipment is to be considered extraordinary maintenance and
may be carried out BY QUALIFIED TECHNICIANS ONLY: incorrect settings may
cause serious damage to the unit and injuries to persons.
The operating parameters and control system settings configurable by means of the microprocessor control
are password protected if they have a potential impact on the integrity of the unit.

Table II - setting of control devices
CONTROL DEVICE
Differential air pressure switch (air flow) ................ Pa
Differential air pressure switch (dirty filter) ............ Pa
CONTROL DEVICE
Maximum pressure switch ................................... Bar-g
Minimum pressure switch .................................... Bar-g
Modulating condensation
control devices (DX versions) .............................. Bar-g
Time lapse between two compressor starts ........... s
SET POINT
50
70
DIFFERENTIAL
30
20
ACTIVATION
DIFFERENTIAL
RESETTING
42.0
2
13.0
1.3
Manual
Automatic
14
480
7
-
-
8.2 Maximum pressure switch
The high pressure switch stops the compressor when the outlet pressure exceeds the set value.
Warning: do not attempt to change the setting of the maximum pressure switch:
Should the latter fail to trip in the event of a pressure increase, the pressure relief
valve will open.
The high pressure switch must be manually reset; this is possible only when the pressure falls below the
differential set (see Table II).
8.3 Minimum pressure switch
The low pressure switch stops the compressor when the inlet pressure falls below the set value for more
than 180 seconds.
The switch is automatically reset when the pressure rises above the set differential (see Table II).
INNOV@ ENERGY -AGU-1407-E
• 20 •
9. Maintenance
The only operations to be performed by the user are to switch the unit on and off.
All other operations are to be considered maintenance work and must thus be carried out by qualified
personnel trained to do their job in accordance with current laws and regulations.
9.1 Warnings
All the operations described in this chapter MUST ALWAYS BE PERFORMED BY
QUALIFIED PERSONNEL ONLY.
Before carrying out any work on the unit or accessing internal parts, make sure you
have disconnected it from the mains electricity supply.
The upper part and the outlet pipe of the compressor reach high temperatures. Be
especially careful when working in the surrounding area with the panels off.
Be especially careful when working in proximity to finned coils since the 0.11 mmthick aluminium fins can cause superficial injuries due to cuts.
After completing maintenance jobs, always replace the panels enclosing the units
and secure them with the fastening screws provided.
9.2 Generalities
To guarantee a constantly satisfactory performance over time, it is advisable to carry out routine
maintenance and checks as described below. The indications below are related to standard tear and wear.
Operation
Frequency
•
Check the efficiency of all the control and safety devices
Once a year
•
Check the terminals on the electric control board and compressor terminal
boards to ensure that they are securely tightened. The movable and fixed
contacts of the circuit breakers must be periodically cleaned and replaced
whenever they show signs of deterioration.
Check the refrigerant level by means of the liquid level indicator
Check the efficiency of the differential air pressure switch and dirty filter
differential pressure switch
Check the condition of the air filter and replace it if necessary
Check the humidity indicator (green=dry, yellow=humid) on the liquid level
indicator; if the indicator is not green as shown on the indicator sticker, replace
the filter
Once a year
•
•
•
•
INNOV@ ENERGY -AGU-1407-E
Every 6 months (DX)
Every 6 months
Every 6 months
Every 6 months (DX)
• 21 •
9.3 Inspecting the air filter

Inspecting the air filter (MODELS 091-131)
−
−
−
Open the front panels to access the air filter compartment.
Pull out the air filter.
Check the condition of the filter and replace it if necessary
Down-Flow
Up-Flow
INNOV@ ENERGY -AGU-1407-E
• 22 •

Inspecting the air filter (MODELS 241-341-462-682)
DOWN-FLOW version:
−
−
−
Open the front panels to access the air filter compartment.
Pull out the air filter.
Check the condition of the filter and replace it if necessary
INNOV@ ENERGY -AGU-1407-E
• 23 •
UPFLOW version:




Open the front panels to access the air filter compartment.
Remove the screws(*) and the metallic support [ (*) no need for tools ]
Extract the filter on the right.
Pull on the right side the second filter and then extract it.
INNOV@ ENERGY -AGU-1407-E
• 24 •
9.4 Set the right fan speed
The adopted fans are of the backward curved blades type in combination with EC motor. This kind of fan has
very high performances so that it’s speed has to be reduced in order to match to the nominal air flow with the
real external pressure drops: in case of wrong selection, the air flow may exceed the limits with possible
water dragging out from the coils (down flow units).
External pressure
drops
DP (Pa)
Unit performance @
full speed
Unit performance @
intermediate speed
Unit performance @
low speed
Nominal
Air flow
Air flow
Air flow over
the limits
In the EC fans the rotation speeds are selected with different values of the control tension (0 – 10V). The
right value of the control tension has to be set by keyboard, considering the AESP requested on site. If the
unit is equipped with the “air flow control” option, the mp manage the fan speed in order to obtain the
required air flow (Air flow set-point).
9.5 Repairing the Cooling Circuit
Warning: while performing repairs on the cooling circuit or maintenance work on the
compressors, make sure the circuit is left open for as less time as possible. Even if
briefly exposed to air, ester oils tend to absorb large amounts of humidity, which
results in the formation of weak acids.
If the cooling circuit has undergone any repairs, the following operations must be carried out:
- tightness test;
- evacuation and drying of the cooling circuit;
- charging with refrigerant.
If the system has to be drained, always recover the refrigerant present in the circuit
using suitable equipment; the refrigerant should be handled exclusively in the liquid
phase.
INNOV@ ENERGY -AGU-1407-E
• 25 •
9.6 Tightness test
Fill the circuit with anhydrous nitrogen supplied from a tank with a pressure-reducing valve until the pressure
rises to 22 bars.
During the pressurisation phase, do not exceed a pressure of 22 bars on the
compressor low pressure side.
The presence of any leaks must be determined using special leak detectors. Should any leaks be detected
during the test, empty out the circuit before repairing the leaks with suitable alloys.
Do not use oxygen in the place of nitrogen as a test agent, since this would cause a
risk of explosion.
9.7 Hard Vacuum and Drying of Cooling Circuit
To achieve a hard vacuum in the cooling circuit it is necessary to use a pump capable of generating a high
3
degree of vacuum, i.e. 150 Pa of absolute pressure with a capacity of approximately 10 m /h. If such a pump
is available, one evacuation will normally suffice to achieve an absolute pressure of 150 Pa.
If there is no such vacuum pump available, or whenever the circuit has remained open for long periods of
time, you are strongly recommended to adopt the triple evacuation method. This method is also
recommended when there is a presence of humidity within the circuit.
The vacuum pump should be connected to the inlets.
The procedure to be carried out is as follows:
- Evacuate the circuit until you reach an absolute pressure of at least 350 Pa: at this point inject nitrogen into
the circuit until you reach a relative pressure of about 1 bar.
- Repeat the step described above.
- Carry out the step described above for the third time, but in this case attempting to reach the hardest
vacuum possible.
Using this procedure you can easily remove up to 99% of pollutants.
INNOV@ ENERGY -AGU-1407-E
• 26 •
9.8 Recharging with refrigerant R410A
- Connect the tank of refrigerant gas to the male 1/4 SAE inlet situated on the liquid line after discharging a
little gas to eliminate air in the connection pipe.
- Fill with refrigerant in liquid form until you reach 75% of the total charge.
- Then connect to the inlet on the pipe between the thermostatic valve and evaporator and complete the
charging process with the refrigerant in liquid form until no more bubbles can be seen on the liquid level
indicator and the operating parameters specified in this manual have been reached.
Since R410A is a binary mixture, charging must take place exclusively with liquid
refrigerant to ensure the correct percentages of the two constituents.
Introduce refrigerant through the inlet in the liquid line.
A unit that was originally made to be charged with R410A, must not be charged other
refrigerants without the written authorisation of LENNOX.
9.9 Environmental protection
The law implementing the regulations [reg. EEC 2037/00] which govern the use of ozone-depleting
substances and greenhouse gases bans the dispersal of refrigerant gases in the environment and requires
whoever is in their possession to recover them and, at the end of their useful life, either to return them to the
dealer or take them to a suitable waste disposal facility.
The refrigerant HFC R410A is not harmful to the ozone layer but is included among the substances
responsible for the greenhouse effect and thus falls within the scope of the aforesaid regulations.
Therefore, special care should be taken when carrying out maintenance work to
minimise refrigerant leaks.
INNOV@ ENERGY -AGU-1407-E
• 27 •
10. Troubleshooting
On the next pages you will find a list of the most common reasons that may cause the package unit to fail or
any malfunction. This causes are broken down according to easily identifiable symptoms.
You should be extremely careful when attempting to implement any of the possible
remedies suggested: overconfidence can result in injuries, even serious ones, to
inexpert individuals. Therefore, once the cause has been identified, you are advised
to contact the manufacturer or a qualified technician for help.
FAULT
The unit does not start.
Possible causes
Corrective actions
Check if power is being supplied
both to the primary and auxiliary
circuits.
The electronic card is cut off from Check the fuses.
the power supply.
Alarms have been released.
Check whether any alarms are
signalled on the microprocessor
control panel, eliminate the causes
and restart the unit.
The phase sequence is wrong.
Invert two phases in the primary
power line after disconnecting
them upstream from the unit.
The compressor is noisy.
The compressor is rotating in the Check the phase sequence relay.
wrong direction.
Invert the phases on the terminal
board after disconnecting the unit
and contact the manufacturer.
Presence of abnormally high Insufficient airflow through the Check for the presence of
pressure.
condenser.
obstructions in the condenser
section ventilation circuit.
Check whether the condenser coil
surface is obstructed.
Check the condensation control
device [optional].
Presence of air in the refrigerant Drain and pressurise the circuit
circuit, as revealed by the and check for leaks. Evacuate
presence of bubbles in the flow slowly [for more than 3 hours] until
indicator also with sub-cooling reaching a pressure of 0.1 Pa and
values exceeding 5 °C.
then recharge in the liquid phase.
INNOV@ ENERGY -AGU-1407-E
No power supply.
• 28 •
FAULT
Presence of abnormally high
pressure.
Low condensation pressure.
Low evaporation pressure.
Possible causes
Unit overcharged, as revealed by a
Sub-cooling of more than 8 °C.
Thermostatic valve and/or filter
obstructed. These symptoms may
also occur in the presence of an
abnormally low pressure.
Transducer fault.
Malfunctioning
valve.
of
thermostatic
Filter dryer clogged.
Low condensation T.
Low level of refrigerant.
The internal thermal protection
device has tripped.
The compressor does not start.
Water out from the unit.
Water out from the unit.
Water out from the unit.
INNOV@ ENERGY -AGU-1407-E
The circuit breakers or line fuses
have been tripped by a short
circuit.
Corrective actions
Drain the circuit.
Check the temperatures upstream
and downstream from the valve
and filter and replace them if
necessary.
Check the efficiency of the
condensation
control
device
[optional].
Warming the bulb with your hand,
check whether the valve opens and
adjust it if necessary. If it does not
respond, replace it.
Pressure drops upstream and
downstream from the filter should
not exceed 2°C. If they do, replace
the filter.
Check the efficiency of the
condensation control device [where
present].
Check the refrigerant level by
measuring the degree of Subcooling; if it is below 2°C replenish
the charge.
In the case of compressors
equipped with a protection module,
check the thermal contact. Identify
the causes after restarting.
Pinpoint the cause by measuring
the resistance of the individual
windings and the insulation from the
casing before restoring power.
Check on the microprocessor,
eliminate the causes.
Check the phase sequence relay.
One of the high or low pressure
switches has tripped.
The phases have been inverted in
the distribution compartment.
The drain pan hole is closed.
Open the front panels, remove the
sheet metal just below the e-panel
(Down Flow units) and clean it.
The siphon is missing.
Check for the presence and provide
for a new one.
The Air flow is too high.
Reduce the fan speed up to
reaching the nominal air flow.
• 29 •
11. Technical data
INNOV@ENERGY
0091
0131
0241
0341
Mini speed compressor
Average speed
compressor
Max speed compressor
Sound pressure level *
dB(A)
44
46
49
51
Compressor
Type (BLDC)
Twin-Rotary
Twin-Rotary
Scroll
Scroll
Nr of compressors/Nr of circuits
1/1
1/1
1/1
1/1
Total capacity
kW
9.3
12.3
24.4
34.4
Sensible capacity
kW
8.3
11.5
23.2
28.9
SHR
0.89
0.94
0.95
0.84
Compressor absorbed power
kW
2.3
3.1
6.7
11.4
Compressor absorbed current
A
3.7
4.9
10.8
18.3
EER
4.05
4.03
3.62
3.02
Fan absorbed power
kW
0.2
0.4
0.9
1.0
Fan absorbed current
A
0.3
0.6
1.5
1.7
Nominal airflow rate
m3/h
2150
3700
6800
7280
Coil air speed
m/s
2.21
2.28
2.78
2.25
Supply temperature
°C
12.6
14.9
14.1
12.4
Total capacity
kW
6.7
8.0
16.2
23.7
Sensible capacity
kW
6.2
8.0
16.2
21.1
SHR
0.92
1.00
1.00
0.89
Compressor absorbed power
kW
1.3
1.5
3.1
5.2
Compressor absorbed current
A
2.0
2.4
5.0
8.4
EER
5.36
5.46
5.24
4.55
Fan absorbed power
kW
0.1
0.2
0.5
0.5
Fan absorbed current
A
0.1
0.3
0.7
0.8
Nominal airflow rate
m3/h
1613
2775
5100
5460
Coil air speed
m/s
1.7
1.7
2.1
1.7
Supply temperature
°C
12.6
15.4
14.6
12.6
Total capacity
kW
2.9
3.9
5.2
8.0
Sensible capacity
kW
2.9
3.9
5.2
8.0
SHR
1.00
1.00
1.00
1.00
Compressor absorbed power
kW
0.6
0.5
0.8
1.3
Compressor absorbed current
A
1.0
0.9
1.2
2.0
EER
4.52
7.23
6.67
6.30
Fan absorbed power
kW
0.1
0.1
0.2
0.2
Fan absorbed current
A
0.1
0.1
0.3
0.3
Nominal airflow rate
m3/h
1075
1850
3400
3640
Coil air speed
m/s
1.11
1.14
1.39
1.12
Supply temperature
°C
16.0
17.8
19.5
17.5
Maxi starting current (without option)
A
9.1
16.5
22.4
33.3
PVE oil load
L
0.35
0.40
1.40
1.40
Finned coil evaporator
Number of rows
4
4
5
5
Type of fins
Traitement Hydrophile sans silicates
Fin spacing
Mm
1,8
1,8
2,1
2,1
Indoor fan
Type
Radial-EC
Radial-EC
Radial-EC
Radial-EC
Electrical supply
V-Ph-Hz
400/3/50
400/3/50
400/3/50
400/3/50
Nr of fans
1
1
1
1
AESP nominal fan speed
Pa
30
30
30
30
AESP maxi fan speed **
Pa
797
709
533
500
Filtration
Filtration
G3
G3
G3
G3
Electrical heaters
Total heating capacity
kW
2,5
4,0
6.4
5.6
Material
Aluminium
Aluminium
Aluminium
Aluminium
Humidifier
Maxi capacity
kg/h
3,0
3,0
3,0
3,0
Absorbed power
kW
2,25
2,25
2,25
2,25
Frame
H
mm
1.875
1.875
1.998
1.998
L
mm
600
900
1.010
1.280
D
mm
449
600
795
795
Weight
kg
157
230
375
605
(*) At 1,5 meter height, 2 meters frontal distance in free field – down flow units (30Pa AESP), nominal air flow, cp speed 50Hz
(**) Values referred to down flow units (30Pa AESP)
The performances are given considering the units in combination with the suggested remoter condensesr and with an outside air T =
35°C.
INNOV@ ENERGY -AGU-1407-E
• 30 •
INNOV@ENERGY
Mini speed compressor
Average speed
compressor
Max speed compressor
Sound pressure level *
Compressor
Type (BLDC)
Nr of compressors/Nr of circuits
Total capacity
Sensible capacity
SHR
Compressor absorbed power
Compressor absorbed current
EER
Fan absorbed power
Fan absorbed current
Nominal airflow rate
Vitesse d’air sur l’échangeur
Supply temperature
Total capacity
Sensible capacity
SHR
Compressor absorbed power
Compressor absorbed current
EER
Fan absorbed power
Fan absorbed current
Nominal airflow rate
Vitesse d’air sur l’échangeur
Supply temperature
Total capacity
Sensible capacity
SHR
Compressor absorbed power
Compressor absorbed current
EER
Fan absorbed power
Fan absorbed current
Nominal airflow rate
Vitesse d’air sur l’échangeur
Supply temperature
Maxi starting current (without option)
Charge d’huile PVE
Finned coil evaporator
Number of rows
Type of fins
Fin spacing
Indoor fan
Type
Electrical supply
Nr of fans
AESP nominal fan speed
AESP maxi fan speed **
Filtration
Filtration
Electrical heaters
Total heating capacity
Material
Humidifier
Maxi capacity
Absorbed power
Frame
H
L
D
Weight
dB(A)
kW
kW
kW
A
kW
A
m3/h
m/s
°C
kW
kW
kW
A
kW
A
m3/h
m/s
°C
kW
kW
kW
A
kW
A
m3/h
m/s
°C
A
L
Mm
0462
0682
0902
58
60
58
Scroll
2/ 2
46.5
46.0
0.99
13.8
22.1
3.37
2.3
3.8
14150
2.57
14.6
30.8
30.8
1.00
6.4
10.2
4.85
1.1
1.8
10613
1.9
15.5
10.0
10.0
1.00
1.6
2.6
6.25
0.4
0.7
7075
1.28
19.9
41.8
1.40
Scroll
2/ 2
68.5
63.7
0.93
23.5
37.7
2.92
2.6
4.2
19420
2.78
14.5
47.6
47.4
1.00
10.7
17.2
4.43
1.3
2.0
14565
2.1
14.4
15.8
15.8
1.00
2.6
4.1
6.18
0.5
0.8
9710
1.39
19.2
57.2
1.40
Scroll
2/ 2
85.9
77.0
0.90
27.2
43.6
3.16
3.5
5.6
22500
3.22
14.1
63.5
58.4
0.92
13.5
21.6
4.71
1.7
2.7
16875
2.4
13.8
30.8
30.8
1.00
4.4
7.1
6.93
0.6
1.0
11250
1.61
15.9
67.2
1.40
4
2,1
4
4
Traitement Hydrophile sans silicates
2.1
2.1
Radial-EC
400/3/50
2
30
482
Radial-EC
400/3/50
3
30
526
Radial-EC
400/3/50
2
30
534
G3
G3
G3
kW
-
11.2
Aluminium
11.2
Aluminium
11.2
Aluminium
kg/h
kW
8.0
6.0
8.00
6.00
8.00
6.00
mm
mm
mm
kg
1998
2030
795
632
1998
2510
795
979
1998
2510
950
1013
V-Ph-Hz
Pa
Pa
(*) At 1,5 meter height, 2 meters frontal distance in free field – down flow units (30Pa AESP), nominal air flow, cp speed 50Hz
(**) Values referred to down flow units (30Pa AESP)
The performances are given considering the units in combination with the suggested remoter condensers and with an outside air T =
35°C.
INNOV@ ENERGY -AGU-1407-E
• 31 •
12. Refrigerant pipes
On site piping has to be installed by professional workers using only CUB quality copper pipes. Take care in
use of nitrogen during all brazing operations in order to avoid humidity and dirty in pipes.
Refrigerant
R410A
ENERGY Model
241-341-462-682
131
091
HP horizontal Gas line [Inch]
[mm]
15,88
5/8
12,70
1/2
9,53
3/8
Hp vertical Gas line
[mm]
[Inch]
12,70
1/2
9,53
3/8
7,94
5/16
Liquid line
[mm]
[Inch]
12,70
1/2
9,53
3/8
9,53
3/8
R410A
R410A
Table up to 10 m of pipe length
The declared performances are calculated for a max lines length of 10m, in the next table, the absorbed
compressor power and the cooling capacity variation percentage for 20m lines, are showed:
241-341-462-682
ENERGY Model
Frequency
30Hz
90Hz
110Hz
131
30Hz
90Hz
091
110Hz
30Hz
90Hz
110Hz
Cooling Capacity [%]
-0.43
-1.37
-1.80
-0.10
-1.05
-1.70
-0.10
-1.71
-2.86
Power Consumption [%]
+0.25
+1.59
+2.48
+0.54
+1.27
+1.72
+0.54
+2.35
+3.36
Standard Copper pipes
Diameter
[mm]
Thickness
[mm]
Minimum
bending
radius [mm]
10
12
16
18
22
28
35
42
54
1
1
1
1
1,5
1,5
1.5
1.5
2.0
36
36
46
56
67
96
70
84
108
System
design
pressure PS
[bar]
42
42
42
42
42
42
42
42
42
PED
Category
Max Copper
σs [N/mm2]
Real copper
σ [N/mm2]
Safety ratio
A3 P3
A3 P3
A3 P3
A3 P3
A3 P3
A3 P3
A3P3
A3P3
A3P3
227
227
227
227
227
227
227
227
227
16.8
21.0
29.4
33.6
26.6
35.0
44.8
54.6
52.5
13.5
10.8
7.7
6.8
8.5
6.5
5.0
4.2
4.3
13. Refrigerant charge
The following table gives an idea of the total refrigerant charge: this should be used just as first reference but the right
charge should be performed on site by a qualified installer .
Note: The INNOV@ENERGY units as well as the remote condenser are shipped filled with nitrogen or dry air.
241-341-462-682*
131
091
[kg]
3.080
2.190
1.210
[kg]
3.870
1.780
1.490
[kg]
5.350
3.870
1.780
[kg/m]
0.130
0.080
0.070
ENERGY Model
Unit Charge
Air Cooled Condenser Charge
(standard unit)
Air Cooled Condenser Charge
(low noise unit)
Charge for liquid line
Note: approximated values (± 20%), to be verified on site.
(*) Values referred to each circuit
INNOV@ ENERGY -AGU-1407-E
• 32 •
lennoxemeia.com
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Due to Lennox’s ongoing commitment to quality, the specifications,
ratings and dimensions are subject to change without notice and
without incurring liability.
Improper installation, adjustment, alteration, service or
maintenance can cause property damage or personal injury.
Installation and service must be performed by a qualified installer
and servicing agency
INNOVA ENERGY-AGU-1407-E